A153951 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 6 ones in any 5 X 5 X 5 subtriangle.

1, 2, 4, 16, 48, 181, 930, 8275, 75027, 1115868, 15698357, 385413794, 9296853593, 385316885091, 15604629751554, 1064622004776402

Offset

0,2

Links

Table of n, a(n) for n=0..15.

Crossrefs

Sequence in context: A034917 A215724 A003433 * A380115 A248748 A350646

Adjacent sequences: A153948 A153949 A153950 * A153952 A153953 A153954

Keyword

nonn

Author

R. H. Hardin Jan 03 2009

Status

approved